Will a heat pump pay off in Dunwoody, GA?
Dunwoody sits right on the fence — how long you'll own the house decides this one. Swap a failed furnace and AC for a heat pump rather than buying like-for-like, and the extra cost here runs $3,500 after a $2,000 federal tax credit. Dunwoody's residents would see roughly $344 a year back in running costs, putting the payback around 10.2 years. Whether that's worth it in Dunwoody depends on how many years you expect to own the place.
The climate behind Dunwoody's payback figure
Dunwoody has a mild winter by US standards — 2569 heating degree days a year against a 65°F base — and summers are hot enough that cooling matters as much as heating, at 1846 cooling degree days. 12°F is the figure equipment gets sized against here — the 99th-percentile cold snap, not an average day — with a record low of 10.9°F on file. Worked through the model, that's a seasonal COP of 2.99 on the cold-climate unit fit for this climate. A cold-climate unit is the right call in Dunwoody — below 25°F design temperature, a standard heat pump leans hard on electric-resistance backup, which erases most of the savings. Climate figures trace to the nearest NOAA station, DEKALB-PEACHTREE AIRPORT, 4.6 miles from Dunwoody.
Dunwoody's running-cost comparison, in dollars
Electricity use for heating alone comes out to about 2,176 kWh a year on the 2000-square-foot reference house; folding in cooling puts the electric bill near $559 a year. That compares with roughly 27 Mcf a year of gas at Dunwoody's 20.42 per-Mcf rate — about $903 a year — against a local electricity rate of 14.90¢/kWh. Priced as a standalone purchase rather than against a like-for-like replacement, equipment payback runs about 39.2 years, for a 15-year net position $1,662 ahead.
The other scenario: no gas furnace to begin with
Plenty of homes in Dunwoody heat with electricity alone, no gas line involved. Swap the comparison to resistance heat instead of gas, and Dunwoody's answer improves. About $767 a year comes back this way, enough that the 10.4-year payback clears the $8,000 premium comfortably within the equipment's life.
Where Dunwoody ranks in this dataset
Ranked against the other 3206 cities covered, Dunwoody comes in at 2108 for heating severity — 1 would be the coldest place in the dataset — and 786 by population, where 1 is largest. That's the middle third for winter severity among the cities covered here.
Deciding what's next in Dunwoody, GA
About 51,795 people live in Dunwoody, Georgia, and every number on this page is what a contractor would actually work from when quoting a system here — the point isn't to replace that quote, it's to tell you whether to bother asking for one. Here, there's no cost penalty to waiting until your current furnace or AC actually needs replacing.
Line up a few local HVAC quotes before you decide.
Where Dunwoody's figure comes from
Nothing above is a black box: the methodology guide shows the full arithmetic behind Dunwoody's 2.99 seasonal COP and payback figure. Dunwoody's 12°F design temperature is below the 25°F line, which is why a cold-climate unit is the right call here — see what that changes in the cold-climate unit guide.